dude no...
unnecessary faces, no loop selection, not mirrored (in your case not mirrored on the X and Y axes), misplaced origin and all in all not very chair like.
at least i would´t sit on it comfortably.
infest more time and you will a hold on the hotkeys.
CG Cookie is a good address:
I'm just a beginner and just recorded what I have done previously.
Thanks for the suggestion though!
my commend sound meaner as intended. Keep working on it!
Support the guy dude! We are all independent creators and learners here